export const addLeadingSlash = path =>
  path.charAt(0) === "/" ? path : "/" + path;

export const stripLeadingSlash = path =>
  path.charAt(0) === "/" ? path.substr(1) : path;

export const hasBasename = (path, prefix) =>
  new RegExp("^" + prefix + "(\\/|\\?|#|$)", "i").test(path);

export const stripBasename = (path, prefix) =>
  hasBasename(path, prefix) ? path.substr(prefix.length) : path;

export const stripTrailingSlash = path =>
  path.charAt(path.length - 1) === "/" ? path.slice(0, -1) : path;

export const parsePath = path => {
  let pathname = path || "/";
  let search = "";
  let hash = "";

  const hashIndex = pathname.indexOf("#");
  if (hashIndex !== -1) {
    hash = pathname.substr(hashIndex);
    pathname = pathname.substr(0, hashIndex);
  }

  const searchIndex = pathname.indexOf("?");
  if (searchIndex !== -1) {
    search = pathname.substr(searchIndex);
    pathname = pathname.substr(0, searchIndex);
  }

  return {
    pathname,
    search: search === "?" ? "" : search,
    hash: hash === "#" ? "" : hash
  };
};

export const createPath = location => {
  const { pathname, search, hash } = location;

  let path = pathname || "/";

  if (search && search !== "?")
    path += search.charAt(0) === "?" ? search : `?${search}`;

  if (hash && hash !== "#") path += hash.charAt(0) === "#" ? hash : `#${hash}`;

  return path;
};
